openssl_cms_encrypt

(PHP 8)

openssl_cms_encryptEncrypt a CMS message

Description

openssl_cms_encrypt(
    string $input_filename,
    string $output_filename,
    OpenSSLCertificate|array|string $certificate,
    ?array $headers,
    int $flags = 0,
    int $encoding = OPENSSL_ENCODING_SMIME,
    int $cipher_algo = OPENSSL_CIPHER_AES_128_CBC
): bool

This function encrypts content to one or more recipients, based on the certificates that are passed to it.

Parameters

input_filename

The file to be encrypted.

output_filename

The output file.

certificate

Recipients to encrypt to.

headers

Headers to include when S/MIME is used.

flags

Flags to be passed to CMS_sign.

encoding

An encoding to output. One of OPENSSL_ENCODING_SMIME, OPENSSL_ENCODING_DER or OPENSSL_ENCODING_PEM.

cipher_algo

A cypher to use.

Return Values

Returns true on success or false on failure.

Changelog

Version Description
8.1.0 The default cipher algorithm (cipher_algo) is now AES-128-CBC (OPENSSL_CIPHER_AES_128_CBC). Previously, PKCS7/CMS was used (OPENSSL_CIPHER_RC2_40).

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